<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card class="box-card">
      <!-- 搜索与添加区域 -->
      <el-row :gutter="23">
        <el-col :span="9">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible=true">添加用户</el-button>
        </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="userList" border stripe align="center">
        <el-table-column label="序号" type="index" width="70px" align="center"></el-table-column>
        <el-table-column label="姓名" prop="username"  width="90px" align="center"></el-table-column>
        <el-table-column label="邮箱" prop="email" width="200" align="center"></el-table-column>
        <el-table-column label="电话" prop="mobile" align="center"></el-table-column>
        <el-table-column label="角色" prop="role_name" align="center"></el-table-column>
        <el-table-column label="状态"  align="center" width="70px">
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
            </el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="200px" align="center">
          <template slot-scope="scope">
            <!-- 修改用户信息按钮 -->
            <el-tooltip  effect="dark" content="编辑用户" placement="top" :enterable="false">
              <el-button type="primary" icon="el-icon-edit" size="small" @click="showEditDialog(scope.row.id)"></el-button>
            </el-tooltip>
            <!-- 删除按钮 -->
            <el-tooltip  effect="dark" content="删除用户" placement="top" :enterable="false">
              <el-button type="danger" icon="el-icon-delete" size="small" @click="removeUserById(scope.row.id)"></el-button>
            </el-tooltip>
            <!-- 修改角色按钮 -->
            <el-tooltip  effect="dark" content="分配角色" placement="top" :enterable="false">
              <el-button type="warning" icon="el-icon-setting" size="small" @click="showRightDialog(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[3,5]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px" >
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password" type="password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUserjiaoyan">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑用户的对话框 -->
    <el-dialog
      title="编辑用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <span>
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
          <el-form-item label="用户名">
            <el-input v-model="editForm.username" disabled></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="editForm.email"></el-input>
          </el-form-item>
          <el-form-item label="电话" prop="mobile">
            <el-input v-model="editForm.mobile"></el-input>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="50%"
      @colse="setRoleDialogClosed()"
      >
      <div>
        <p> <strong>当前用户 - {{this.userInfo.username}}</strong></p>
        <p> <strong>当前角色 - {{this.userInfo.role_name}}</strong></p>
        <p> <strong>分配新角色 </strong>
          <el-select v-model="selectedRoleId" placeholder="请选择角色"
          clearable>
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="setRoleForUser">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    // 自定义校验规则
    var checkEmail = (rule, value, cb) => {
      const regEmail = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/
      if (regEmail.test(value)) {
        return cb()
      }
      cb(new Error('邮箱不合法'))
    }
    var checkMobile = (rule, value, cb) => {
      const regMobile = /^(13[0-9]|14[5|7]|15[0-9 ]|17[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\d{8}$/
      if (regMobile.test(value)) {
        return cb()
      }
      cb(new Error('手机号不合法'))
    }
    return {

      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 3
      },
      userList: [],
      // 共有多少条数据
      total: 0,
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 控制编辑用户对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配权限的用户信息对象
      userInfo: {},
      // 所有角色列表数据
      rolesList: [],
      // 分配角色时被选中的角色
      selectedRoleId: '',
      // 添加用户的表单数据对象
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 编辑用户的表单数据对象
      editForm: {
        username: '',
        email: '',
        mobile: ''
      },
      // 添加用户的表单验证规则对象
      addFormRules: {
        username: [
          {
            required: true,
            message: '请输入用户名',
            trigger: 'blur'
          }, { min: 3, max: 10, message: '用户名长度为3-10个字符之间', trigger: 'blur' }
        ],
        password: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          }, { min: 6, max: 15, message: '密码长度为6-15个字符之间', trigger: 'blur' }
        ],
        email: [
          { // 校验是否输入邮箱

            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          // 校验是否合法
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机号',
            trigger: 'blur'
          },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 编辑用户的表单验证规则对象
      editFormRules: {
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机号',
            trigger: 'blur'
          },
          { validator: checkMobile, trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    async getUserList() {
      const { data: res } = await this.$http.get('/users', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取用户列表失败')
      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听pagesize改变的事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      // 切换每页显示多少条数据之后，用新的newSize来重新获取数据
      this.getUserList()
    },
    // 监听页码值改变的事件
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听Switch开关状态改变 修改用户状态
    async userStateChanged(userinfo) {
      const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      console.log(res.meta.status)
      if (res.meta.status !== 200) {
        // 如果操作失败 将用户状态取反 保证页面上开关状态不变
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('更新用户状态失败')
      }
      this.$message.success('更新用户状态成功')
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      // 重置表单
      this.$refs.addFormRef.resetFields()
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 监听分配角色对话框的关闭事件
    setRoleDialogClosed() {
      this.selectedRoleId = ''
      this.userInfo = {}
    },
    // 添加用户 点击确定按钮，进行预校验
    addUserjiaoyan() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('添加用户失败')
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加用户失败')
        this.$message.success('添加用户成功')
        // 添加成功后隐藏对话框
        this.addDialogVisible = false
        // 刷新用户列表
        this.getUserList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 编辑用户信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请重新输入')
        // 发起修改用户信息的请求
        const { data: res } = await this.$http.put('users/' + this.editForm.id,
          { email: this.editForm.email, mobile: this.editForm.mobile })
        if (res.meta.status !== 200) return this.$message.error('更新用户信息失败')
        //  更新成功 关闭对话框
        this.editDialogVisible = false
        // 更新数据
        this.getUserList()
        // 提示用户
        this.$message.success('更新用户信息成功')
      })
    },
    // 删除用户
    async removeUserById(id) {
      // 弹框询问用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)// 捕获取消行为 返回值为cancel
      // 如果用户确认删除 就返回字符串'confirm'
      if (confirmResult !== 'confirm') { // 用户点击了取消
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getUserList()
    },

    // 展示为用户分配角色的对话框
    async showRightDialog(userInfo) {
      this.userInfo = userInfo
      // 展示对话框之前获取所有角色的列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$msaage.error('获取角色列表失败')
      }
      this.$message.success('获取角色列表成功')
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },

    // 点击按钮分配角色并提交
    async setRoleForUser() {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择用户角色！')
      }
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`,
        { rid: this.selectedRoleId })
      if (res.meta.status !== 200) {
        return this.$message.error('分配角色失败')
      }
      this.$message.success('分配角色成功')
      this.getUserList()
      this.setRoleDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>

</style>
